Timing device



Nov. 22, 1932' w. G. SHELTON 1,888,809

TIMING DEVICE Filed Nov. 24, 1928 2 Sheets-Sheet 1 Nov. 22, 1932. 8 SHELTON 1,888,809

.TIMING DEVICE Filed Nov. 24, 1928 2 Sheets-Sheet 2 A TTapA/EY Patented Nov. 22, 1932 UNETED WILLIAM G. SHELTON, OF ST. LOUIS, MISSOURI TIMING DEVICE Application filed November 24, 1928. Serial No. 321,623.

My invention relates to electrical apparatus used in connection with heating devices and consists in a novel device for facilitating the setting of clock mechanism by which the current to the heating device is controlled.

The heat produced by electrical heating elements varies with the voltage and the voltage in theusual public service supply lines varies substantially. For instance, the ordinary 110 volt circuit may vary from 90 to 130 volts and this Variation is suilicient to seriously affect the time required for a heating operation, particularly if that operation is at all delicate.

One of the objects of my invention is to provide means associated with a time clock and an electric circuit controlled thereby for varying the time, before the clock will operate, according to the voltage in the circuit 29 with which the heating device is associated.

Another object of invention is to eliminate, as far as possible, any computation by the attendant in utilizing the device. In other words, to make it possible for the attendant to readily set the clock without referring to charts or tables separate from the device, and, in my preferred construction, I eliminate the necessity of reference to any chart whatever.

The accompanying drawings illustrate a form of my invention which has been designed for use with hair waving apparatus in which any substantial variation from the maintenance of proper heat conditions will seriously affect the operation and, in fact, subject the hair to the likelihood of being scorched. It will be understood that my invention is not limited to this particular field but may be utilized with all kinds of cooking operations andwherever there is any desired relation between the degree of heat and the time which a particular degree of heat is to be applied.

In my drawings- Figure 1 is a front elevation of a preferred form of my invention and Figure 2 is a side elevation of the same.

Figure 3 is a front elevation of a modified form of my invention and Figure 4 is a side elevation of the same.

Figure 5 is a View of the chart contained in the upper portion of the device illustrated in Figures 3 and 4.

The device illustrated in Figures 1 and 2 includes a switch, a clock and a voltmeter and these devices perform their usual functions in my device in the usual way and do not, in themselves, involve novel structure. Hence, I have not illustrated the switch struc ture, or the clock mechanism or the voltmeter parts. It Will be understood that the switch may be closed or opened manually by means of the handle 1 and will be opened automatically by means of the clock-work. The clockwork may be set manually by means of the knob 2 and will be provided witha key for winding in the usual manner. The device is provided with a conduit 3 having terminals 4c and 5 for attachment to a source of current supply and to the device to be heated. It will be understood that the switch, controlled by handle 1, is placed in this conduit. The voltmeter in the device is placed in the circuit between terminals 4: and 5 and will include a hand 6 which will be moved to different positions according to the voltage in the circuit. Adjacent to the end of hand 6 I show a scale 7 running from right to left and having markings indicating Voltage from 90 to 120.

Connected to the clock setting knob 2 is a hand 8 and associated with hand 8 is a scale 9 running from left to right and having markings'indicating minutes from 1 to 30. These scales 7 and 9 give information which may be of value in testing or adjusting the device and may be of interest to the user but these scales are not essential to the operation and use of the device. IV hen the heater is turned on, the voltmeter hand 6 automatically moves to a position on scale 7 which position is determined by the Voltage of the current passing through the device. At the same time hand 6 is opposite a corresponding portion of scale 9 and thereby automatically indicates the period for which the clock should be set for the waving operation and the operator then manually turns knob 2 so that hand 8, attached thereto, is aligned with the Voltmeter hand 6. The device is then set to open the circuit at the proper time for the operation of the apparatus to which the device is attached. It will be seen that it has not been necessary for the attendant to have any understanding or knowledge of voltage or to make any computation or readings in order to properly use the device.

Preferably, all of the parts are enclosed in a suitable casing 10 mounted on a back late P having brackets 11 and 12 on its rear whereby the device may be mounted upon the standard of a heater machine.

In the modified form shown in Figures 8, 4: and 5, my invention is adapted for use with time clocks manufactured separately from the voltmeter and in this form of my invention, the clock and switch casing 13 is mounted upon a back plate 14 provided with standard engaging brackets 15 and 16. The voltmeter casing 17 is formed separately from the clock casing 13 and is mounted thereon or may be separately secured to the back plate 14.

The voltmeter includes a chart 18 having a voltage scale 19 thereon and, associated with the voltage scale, a minute scale 20. The voltmeter indicating hand 21 points to the required number of minutes for which the clock is to be set but it is necessary for the operator to move the clock hand 22 along another scale 23. The operator will be guided by the indication of hand 21 on scale 20.

i The clock is set by the knob 24:, to which hand 22 is attached, similarly to the setting of the clock in the preferred structure illustrated in Figures 1 and2.

The chart 18 includes certain data for varying the setting of the clock according to the degree or quality of the hair to be waved. It will, be understood that this data may be used also in connection with the device shown in Figures 1 and 2 and includes directions as to cooling which may be followed independently of the operation of the device.

Obviously, the details of construction are not material to the successful use of the device and I contemplate the exclusive use of all such modifications of the invention as come within the spirit thereof as expressed in my claims.

I claim:

1. In a device of the class described, a voltmeter, ascale of time units and a hand movable along said scale by the current in the circuit to vwhich the device is attached, a clock for opening said circuit, a member for setting said clock to determine the time at whichit Willv operate as described, and a hand movable along said scale by said memher.

2. In a device of the classdescribed, a switch, aclock for opening said switch, a voltmeter, a voltage scale extending from a low voltage to high voltage in one direction, a time scale extending from a short time to a longer time inthe opposite direction, a hand movable along said voltage scale by said gVOltlIlGtQI, a, member for manually setting said clock to open said switch, and a hand movable with said member along said time scale.

3. In a device of the class described, a conduit for electric current, a switch for said conduit, an element movable to different po sitions by the voltage of the current in said conduit, a clock for opening said switch, means for selectively setting said clock to operate at different periods, and a member movable with said means and adapted to be alined with said element for indicating a desired setting of said clock.

4-. In a device of the class described, a conduit for electric current, a switch for said conduit, an element having movement to clifferent positions by the, voltage of the current in said conduit, a clock for opening said switch, means for selectively setting said clock to operate at different periods, and a member having movement similar to the movement of said element and adapted to be moved into position contiguous to said element to thereby effect the desired setting of said clock.

5. In a device of the class described, a switch, a clock for opening said switch, a voltmeter, a voltage scale extending from a low voltage to a high voltage inone direction, a time scale paralleling and adjacent to said voltage scale and extending froma short time to a longer time in the opposite direction, a hand movable alongboth of said scales by said voltmeter,a member for manually setting said clock to open said switch after a desired period, and a hand movable with said member along both of said scales.

In testimony. whereof I hereunto affix my signature this 21 day of November, 1928,

. WILLIAM GSHELTON. 

